$(function(){
    var $this = $(".renav");
    var scrollTimer;
    $this.hover(function(){
          clearInterval(scrollTimer);
     },function(){
       scrollTimer = setInterval(function(){
                     scrollNews( $this );
                }, 2000 );
    }).trigger("mouseout");
});
function scrollNews(obj){
   var $self = obj.find("ul:first");
   var lineHeight = $self.find("li:first").height();  
   $self.animate({ "margin-top" : -lineHeight +"px" },600 , function(){
         $self.css({"margin-top":"0px"}).find("li:first").appendTo($self);
   })
}